Carbureter.



A. C. BENNETT.

CARBURETER.

APPLICATION FILED SEPT. 2. 1914.

LQGUU. Patented Mar. 26, 1918.

expanded portion at the ASHLEY C. BENNETT, 0F MINNEAPOLIS,` MINNESOTA.

cannoan'rnn.

Application led September 2, 1914. Serial No. 859,787.

To all whom t may concern.'

` Be it known that I, ASHLEY C. BENNETT, a citizen of theA UnitedStates, residing at Minneapolis, in the county of Hennepin and State ofMinnesota, have invented certain new and useful Improvements inCarbureters, of which the following is a specification.

My invention relates to carbureters and has for its object to provide acarbureter wherein a fixed deflecting member in' the path of movement ofthe primary air and the fuel oil mixing therewith will cause said airand oil to move in an outwardly whirling manner so as to throw particlesof uncarbureted oil into contact with the walls of the mixing chamber.

The full objects and advantages of my invention will appear inconnection with the detailed description thereof and are particularlypointed out in the claims.

IvIn the drawings, illustrating the application of my invention in oneform,-

Figure 1 is a sectional elevation of a carbureter having my improvementsapplied thereto. Fig. 2 is a section on line2-2 of Fig, 1. Fig. 3 is alongitudinal section of apart of the device at the end of the feed pAsillustrated, the casing 10 provides the oil chamber in which float l1regulates the supply of oil in a well known manner so as to keep thelevel at a point indicated by a dotted line at 12. I provide a casing 13and chamber 14 which opens into a larger delivery pipe 15 which isconnected by another passageway 16 with a source of secondary air, notshown. The lower portion of chamber le is closed by plug 17, the top ofsaid plu and the curved inner walls of casing 13 orming a cup-likecavity 18 below the openings 19 for admitting primary air. The plug 17has a central aperture 20. To lthe lower ortion of this aperture fueloil is admitted, from casing 10 through a duct 21, the extent of openingof the aperture 2() being controlled by a hand-operated needle valve 22.The aperture 20 o ens into an top of the plug 17 in which is set a feedpipe 23and the opening into feed pipe 23' is controlled by a needlevalve 24, the shaft 25 cef which extends through the center of feed pipe23 and through a slidable hearing 26 at the upper end of said feed pipeand into 4the passage way 15, where sald valve is controlled by aSpecification of Letters Patent.

Patenten Mar. ee, raie.

lever 27 actuated by the admission of secondary air in a well known way,which forms no part of the invention of this application, and does notneed to be described herein. At the top of the feed pipe 23 andsurrounding the outside of the bearing por tion Vor sleeve 26 is aspreader member 2 8 having a series of blades 29 overlapping in afan-like manner so as to give openings between the blades turnedupwardly and obliquely toward the inner walls of the chamber 14. Thespreader 28 therefore serves to divide the passageway 14 into a lowerportion surrounding the feed pipe 23 where the initial mixing of thefuel oil and primary air takes place, and an upper more extended portionabove the spreader 28. In this upper passageway the moving column of airand fuel oil is caused to whirl violently so as to impinge upon theinner walls of chamber 14. All particles of fuel oil which pass throughthe spreader vin liquid form are thrown centrifugally against thesewalls, where said particles are either evaporated from the walls in theeurent of air or may move back to the spreader member 28 again to becarried up and thrown against the walls.

The advantages of this construction are obvious. The member 28 isstationary and provides a .direct baille for preventing upward movementof large drops of liquid. The whirling movement given the volume of airby the spreader' member is such as certainly to cause all drops ofliquid to be thrown upon the walls of the passageway. The length of thepassageway before the opening if secondary air is reached is such thatunder normal conditions all of the fuel oil thrown upon the walls of thepassageway 14' will be Vevaporated b the moving current of air. Theheavier rops reach the walls first or at the lower portions thereof. nlythe ver lightest and smallest drops will reach t e walls of chamber 14at the peint near the opening therefrom into the passageway 15. rihe lmof oil upon the upper portion of the walls of chamber 14: will thereforebe very much thinner than the film toward the bottom thereof. Therenever will be a volume of drops upon the upper portion of the walls ofchamber 1a of sufficient volume so that unevaporated liquid can becarried into the passageway 15, and if the hlm of oil upon the lowerportion of the walls of passage lll@ Mii

Way 14 becomes suiiiciently heavy so that oil will gravitate downwardly,such oil in passin to the lspreader member will again be bro en up andthrown back upon the walls of chamber 14. It will readily be apparent,therefore., that my carbureter will produce a highly eiiicient andsatisfactory carbureting of the primary air and will deliver anexplosive mixture into the pipe 15 for admixture with the secondary airwhich is free from unevaporated particles or drops of liquid fuel oil.

I claim:

1. A carbureter comprising a casing forming a cylindrical chamber closedat the bottom and provided with air-inlet openings above said bottom foradmitting air into the lower portion of the chamber, a fuel feed throughsaid spreader member to whirl andpipe extending through said bottom aportion of the way into said chamber, said fuel feed pipe being providedwith a multiplicity of apertures for permitting fuel oil to be inj ecteddirectly into the lower portion of said chamber and into the currents ofair passing through said inlet openings, and a spreader member fixedlylocated at the upper end of said fuel feed pipe and having means tocause the mixture of fuel oil and air passing throw drops of liquidagainst the walls of said mixing chamber.

' 2. A carbureter comprising a casing forming a chamber closed at itsbottom having means for admitting primary air thereto above said bottom,an oil feed pipe centrally positioned in said passa eway and extendingthroughout a portion o the length thereof, means above the top of thefeed pipe dividing the passageway into two portions through which themixture of primary air and fuel oil must pass, said dividingmeans'acting upon the current of air and fueloil to cause the same towhirl and throw drops'of liquid upon the walls of the passageway, andmeans to admit fuel oil to the feed pipe.

3. A carbureter comprising a casing forming a chamber closed at itsbottom having means for admitting primary air thereto above said bottom,an oil feed pipe centrall positioned in said passageway and exten ingthroughout a portion of the length thereof, a series of overlappingplates or fins extending in oblique relation from the top of the feedpipe to the walls of said passageway and rigidly secured in position soas to provide a multiplicity of openings directed toward the walls ofsaid passageway through which the mixture of primary a1r and fuel oilmust pass, whereby said mixture is given a whirling movement and dropsof liquid are thrown upon the inner walls of the passageway, and meansto admit fuel oil to the feed pipe.

4. A carbureter' comprising a casing forming a cylindrical chamber, aplug having a central aperture secured in the bottom of said casing, ahand operative needle-valve extending into the lower end of the centralaperture, an air controlled needle valve extending into the upper end ofthe central aperture, a fiuid feed pipehaving its lower end positionedin an enlarged portion of the central aperture at the top of said plug,said fuel feed pipe being provided with a multiplicity of apertures forpermitting fuel oil to be injected directly into the lower portion ofsaid chamber, means above the bottom of the casing for admitting airinto the lower portion of the chamber around said fuel feed pipe, and aspreader member ixedly mounted on the upper end of said fuel feed pipeand having means to cause the mixture of fuel oil and air passingtherethrough to whirl and throw drops of the liquid against the walls ofthe upper portion of said chamber.

5. In combination with the mixing chamber of a carbureter, a stationaryspreader' member therefor comprising a rim closely fitting said chamber,a central hub and a plurality of overlapping blades extending obliquelyfrom said hub to said rim and a fuel feed pipe upon the upper end ofwhich said central hub istted.

6. A carbureter Comprising a casing forming a chamber closed at itsbottom and having means for admitting primary air thereto above saidbottom, an oil feed pipe centrally positioned'in said-passageway andextending throughout a portion of the length thereof, a spreader memberat the top of the feed pipe through which primary air and fuel mustpass, and means centrally positioned in. said feed pipe and extendingthrough said spreader member for admitting fuel oil into said feedpihpe.

In testimony whereof I a x my signature in presence of two witnesses.

y ASHLEY' C.' BENNETT Witnesses H. A. Bowl/IAN, F. A. WHITFLEY.

